The shop manual said to shift into forward. this would allow enough room to remove the pinion nut. then pull up on the drive shaft. If necessary use the omc puller 390706 and backing plate 325867 to break the lock. I used this method and instead of popping off the pinion it separated the upper and lower shaft.The drive shaft retainer stayed in the lower. I thought I was doing the correct procedure and now I don't know how I can remove the pinion. I tried to insert a tool in the casing to pry it off, but that did not work. With the upper out I have nothing to pull up the lower. If I could get it out, I have a complete drive shaft and pinion gear to replace it, In other words, damaging the shaft would be ok. I doubt hitting the upper to reinsert it in the retainer would work. I was hoping you had a way. Thanks for your patience.